The pressing issues of global warming and the rapid depletion of fossil fuel reserves have prompted both private and governmental organizations to seek clean, renewable energy alternatives. Solar and wind energy have been extensively researched, leading to significantly reduced costs for energy production. However, to address the intermittent nature of these energy sources, reliable methods […]
Data is necessary to improve our understanding of dynamic environments, like the ocean. With limited sensing resources, the challenge lies in identifying and acquiring sensor measurements over large spatial and temporal scales. One solution is to use a team of robots equipped with sensors to collect data. However, robot teams still require methods that effectively […]
Battery technologies are crucial for reducing greenhouse gases by enabling the use of renewable energy and facilitating the transition to electric vehicles, thereby lowering emissions. Lithium metal anodes are ideal for next-generation batteries in automotive applications due to their high energy density. However, issues such as dendrite formation and solid electrolyte interphases (SEI) affect their […]
Sliding touch is one of the key inputs for the perception of materials in our environment. We are interested in the contribution of fingertip friction to the process of tactile exploration and perception. Psychophysical studies address correlations between subjective judgements of perception and measured physical parameters of interactions, in our case of friction on materials […]
Abstract: Metal oxides, both simple and complex, are essential for catalysis and energy conversion due to their versatile physicochemical properties and are often enhanced through ion doping, a well-established strategy to improve their functionality. However, challenges remain, particularly in accurately characterizing the surface stability of such oxides beyond idealized conditions and in understanding the thermodynamics […]
Mobile robots have shown significant advancements in agility, intelligence, and efficiency over the past few decades. However, their endurance and overall performance remain limited by the onboard power supplies. Current power sources typically restrict mobile robots to areas close to the electrical grid and necessitate heavier batteries for extended range. Energy refueling could be significantly […]
Abstract: It is crucial for chemical and manufacturing industries to ensure safe and reliable operation of their plants and processes, by mitigating safety issues (e.g., extreme operating conditions) and reliability issues (e.g., production losses). But, a significant challenge faced by these industries is that such events are rare and undesirable, with little occurrence data available […]
Machine learning has been widely adopted to medical imaging research, yet it suffers from domain shift for real world applications. Due to the heterogeneity of medical data, machine learning-based diagnostic models are also prone to biases. In this thesis, we start from arguing the necessity of domain adaptation to achieve the optimal performance for each […]
This talk will present a brief overview of advances in ferroelectric devices and their integration into computing systems to provide novel functionality and energy efficiency in various data intensive applications. The talk will emphasize on cross-stack design opportunities in designing stacked intelligent 3D memory systems.
I plan to tell two short stories. The first story is about a new drop fluidics that uses a deformable and stretchable elastomeric film as the platform. Such a soft film decorated with magnetic particles can be deformed locally with an external magnetic field. When these deformations are coupled with capillary force, small liquid drops […]
Machinery relies on lubrication to regulate the friction and wear at contacting interfaces. As new lubricants become less viscous to comply with environmental and cost-saving standards, the risk of surface-initiated machine failure grows. We show that metal oxide additives in low-viscosity lubricants will form protective coatings, or tribofilms, in situ at contacting interfaces. Compared to […]
The Department of Bioengineering at the University of Pennsylvania and Dr. Andrew Maidment are pleased to announce the Doctoral Dissertation Defense of Chloe Jeongin Choi. Title: INVESTIGATION OF IMAGE QUALITY SPATIAL DEPENDENCY IN RELATION TO ACQUISITION GEOMETRY IN DIGITAL BREAST TOMOSYNTHESIS Date: Wednesday, July 17, 2024 Time: 10:00am Location: Reunion auditorium, JMB.
To kick off the IC2S2 conference being held right here at the University of Pennsylvania, we warmly invite you to join us for Dirk Helbing’s (ETH Zurich) Virtual Keynote address “Societies are complex systems. So, how to manage them?, to be given at 1 pm ET / 7 pm CET on Wednesday, July 17th. The […]
The Department of Bioengineering at the University of Pennsylvania and Dr. Jim Gee are pleased to announce the Doctoral Dissertation Defense of Yifan Wu. Title: Knowledge-Integrated Learning for AI in Medical Image Analysis Date: July 17, 2024, Wednesday Time: 2:30 PM to 4:40 PM Location: Towne Room 337 Zoom option: https://upenn.zoom.us/j/96378457553?pwd=Zf5UWdZmA87iVawEPnGmvMOOURbNDo.1 The public is welcome to […]
These talks will be held jointly, with each talk 30 minutes each (1 hour total). Talk 1: "Optimizing Anomaly Detection for GenAI based Digital Twins of Wearable Data" (Uma Balakrishnan) In this presentation, we introduce a methodology that utilizes both real and synthetic datasets (digital twins) to address the uncertainties associated with anomaly detection thresholds […]
Abstract: Nanostructured materials with interconnected nanoscale structures have garnered significant attention due to the ability to precisely regulate molecular transport by tuning molecular-level properties and offering more functional interfaces for interactions compared to bulk systems. Through self-assembly, liquid crystal (LC) mesophases offer a route to achieve nanostructured polymers, a promising alternative to traditional nanostructured inorganic […]
Abstract: Micro unmanned vehicles, defined as 25-gram to 5-kg in weight, are increasingly being utilized in applications such as search and rescue or agricultural monitoring. Such vehicles are typically powered with lithium-ion batteries. However, vehicle operational efficiency and capability are often compromised by the limited energy density of these batteries, resulting in short operational duration. […]
Multi-robot coordination and cooperation are critical behaviors that improve team performance and enable new tasks in application areas like autonomous construction, agriculture, and extended operation in large unknown regions. This dissertation examines these behaviors in the context of the multi-robot resource allocation problem, where robots must be allocated to regions of demand. In particular, we […]
Aluminum scandium nitride (AlScN), a ternary alloy by doping scandium into aluminum nitride (AlN), has circumspectly gained recognition through the last decade as one of the promised materials in forming the next generation radio frequency (RF) filters and resonators - core components in the wireless telecommunication systems that interconnect today’s world. This, coupled with the […]
Structural failure is a critically important design consideration in many engineering applications. Nature provides a number of interesting examples of lightweight structural features that exhibit outstanding failure characteristics. Recent progress in additive manufacturing has facilitated precise control over geometric features, allowing for the implementation of bio-inspired structural designs on a layer-by-layer basis. In this talk, […]
Temporary and switchable underwater adhesion plays an important role in robotic underwater locomotion and transportation. The physical features of the suction cups of octopuses have been mimicked, where the vacuum chamber formed by the deformation of these cups enable strong adhesion. However, the works mainly focused on the strength of the underwater adhesion. For the […]
The Department of BIoengineering at the University of Pennsylvania and Dr. Lukasz Bugaj proudly announce the Doctoral Dissertation Defense of WIlliam Benman. Title: Remote control of cell function using temperature as an input Advisor: Lukasz Bugaj Date: Wednesday, July 24, 2024 Time: 10:00AM EST Location: Skirkanich Hall, Berger Auditorium, Rm. 013 Zoom option: https://upenn.zoom.us/j/91967695550 The public […]
Bipedal robots have seen significant interest from academia and industry for their potential to efficiently traverse unstructured environments, such as disaster zones, industrial infrastructure, and cluttered homes. Autonomous bipedal walking in the wild remains an unsolved challenge, however, partially due to the difficulty of perceiving and reacting to obstacles in real-time, while maintaining balance. Existing […]
